Same problem for the DSA, to distinguish how many were made for the US Market and for the European Market.
Even if, in this last case, the European is much rarer.
About the Memo Parking, now, it should have unsigned crowns, so, my guess is that your crowns were changed at a certain time, while your watch was serviced.
As for the Brown E 855, it is not a watch, it is a massacre!
I'm totally in love with this one, too.
Best, my friend.
Nicolas.